from decimal import Decimal
name = '张三'
print(name)
print(id(name))
print(type(name))
n1 = 1.1
n2 = 2.2
print('n1+n2=', n1 + n2)


print(Decimal('1.1') + Decimal('2.2'))
n3 = 2.1
print(n1 + n3)

a1 = True
a2 = 'True1'
print(a1, type(a1))
print(a2, type(a2))

name1 = '罗老师'
name2 = '张三'
print(name1 + name2)  # +号是连接符
